Possible nerve damage after lipo? Or is this normal to itch like crazy?

I had flanks, upper, lower abdomen lipo & fat transfer to the butt. 5 days post-op now and have considerable amount of bruising but the itching is unbearable. The itch (stomach and gential area) is from the inside out so scratching the area only irritates it worse. I get some relief from briefly removing my garment but putting it back on brings me right back to where I was. I am on Hydros for pain and told I can take an OTC allergy pill but that did nothing for the itching yesterday.